EP0398091A1 - Air filter with horizontal filter elements - Google Patents
Air filter with horizontal filter elements Download PDFInfo
- Publication number
- EP0398091A1 EP0398091A1 EP90108476A EP90108476A EP0398091A1 EP 0398091 A1 EP0398091 A1 EP 0398091A1 EP 90108476 A EP90108476 A EP 90108476A EP 90108476 A EP90108476 A EP 90108476A EP 0398091 A1 EP0398091 A1 EP 0398091A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter elements
- housing
- door
- transport air
- access
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000428 dust Substances 0.000 claims abstract description 59
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 239000002245 particle Substances 0.000 claims abstract description 28
- 238000004140 cleaning Methods 0.000 claims description 12
- 239000003566 sealing material Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 2
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 230000005484 gravity Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2407—Filter candles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0004—Details of removable closures, lids, caps or filter heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
- B01D46/60—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
- B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
Definitions
- This invention relates generally to apparatus for filtering large volumes of transport air having dust or other foreign matter entrained therein by passing such transport air through a plurality of self-cleaned filter elements, usually cylindrically shaped pleated paper filter elements.
- the presence of the baffle at the inlet of the dust collector inherently interferes with the downward flow of the dust particles impinging thereagainst, whereby the relatively large particles tend to remain entrained in the transport air for cleaning by the filter elements rather than passing directly to the bottom of the dust collector for collection thereat without burdening the filter elements in a manner that can increase the pressure drop thereacross and/or require most frequent cleaning by the pulse jet cleaning apparatus.
- the present invention provides a dust collector or filtering apparatus which obtains all of the space saving advantages obtained from using horizontally disposed filter elements while also alleviating the aforesaid drawbacks associated with known apparatus.
- apparatus for filtering dust and the like entrained in a flow of transport air or other gas comprising a generally enclosed housing having a side wall, an upper filtering portion, and a lower collection portion.
- a plurality of conventional filter elements are disposed in the upper portion of the housing, each such filter element being generally hollow and mounted with its central axis extending substantially horizontally away from the side wall of the housing, the filter elements being arranged in at least one, and preferably two, generally vertical columns with a predetermined spacing between each filter element and between the two columns.
- An inlet arrangement for the dirty air is located at the side wall of the housing, and it is formed to direct the dirty air in a predetermined flow path that is directed downwardly toward the lower collection portion of the housing and alongside the exterior surfaces of the filter elements in the aforesaid vertical column or columns, whereby the heavier particles of foreign matter entrained in the transport air will be carried by inertia and the transport air directly to the lower portion of the housing for collection thereat, and the lighter particles of foreign matter will be separated from the carrier air by passing through the filter elements.
- An outlet is provided for communicating with the downstream side of the filter elements for permitting removal of the cleaned transport air, and, preferably, a conventional pulse jet cleaning apparatus is provided for periodically transmitting pulses of pressurized air to the interior of the filter elements for cleaning dust particles and the like from the exterior surface of such filter elements.
- the filter elements are arranged in two vertical columns having a spacing therebetween, and the inlet for the dirty air includes an opening in the side wall of the housing that is positioned adjacent the spacing between the two columns of filter elements. Additionally, the inlet includes a specially formed plenum that receives transport air adjacent the top of the housing and directs the transport air in a downward direction toward and through the inlet opening, the inlet plenum having a gradually decreasing cross-sectional area along its downward extent.
- each filter element is individually supported in the upper housing by three support rods extending horizontally across the upper housing, with two of such support rods being spaced apart to permit the exterior surface of the cylindrical filter elements to rest thereon, whereby such support rods constitute the sole support for the filter element, and the third support rod extends above the surface of the filter element to prevent movement of the filter element in any direction.
- the housing includes an access wall having a plurality of access openings therein, each access opening being aligned with a cluster of three support rods for each filter element, whereby the filter elements can be easily inserted in, or removed from, the upper housing by moving the filter element through the access openings and sliding them along the horizontally extending support rods.
- Each access opening is preferably provided with a hinged door that includes a resilient sealing material mounted on the inside face of the door so that when the door is at its closed position to cover the access opening, the sealing material will be urged against the end of the filter element for that access opening to thereby seal the end of the filter element and prevent the flow of dirty air around the end of the filter element.
- each door is provided with a unique latch arrangement that includes cooperating slots located in the door and in the housing, and a carriage bolt member slidable in these slots between an inoperable position releasing the door to permit opening thereof, and an operable position at which the door is maintained at its closed position, the carriage bolt member including a manually turnable element for readily securing the door in its closed position without requiring any tools.
- FIGs. 1 and 2 illustrate a dust collector or filtering apparatus 10 which includes an upper housing portion 12 in which filtering of transport air having entrained foreign particles therein is carried out in a manner to be described presently, and a lower housing portion 14, generally referred to as a hopper, in which the particles separated from the transport air are collected and ultimately removed in any conventional manner through the bottom of the hopper 14.
- a plurality of legs 16 are provided, and lifting lugs 18 may also be provided for lifting and moving the filter apparatus 10 when desired.
- the upper housing portion 12 is rectangular in shape, and includes a side wall 20 opposed to and facing an access wall 22.
- a plurality of support rods 24 extend horizontally across the upper housing portion 12 and they are supported at each end thereof in the access wall 22 and the side wall 20, respectively. As shown in Fig.
- the side wall 20 has a plurality of outlet openings 26, the function of which will be explained presently, and it will be noted that the support rods 24 are arranged in clusters of three rods lying in a generally circular pattern and spaced from one another so that the bottom two rods in each cluster are parallel to one another whereby a filter element 28 can rest thereon, and the third rod in each cluster is located generally above the filter element 28 so that it is essentially contained against movement in any direction by the cluster of three support rods 24.
- the filter elements 28 are conventional and may be of any well known constructions, and they are preferably formed as cylinders using a pleated paper filter media.
- two cylindrical pleated paper filter elements are supported in each cluster of three support rods, and they are arranged end-to-end with their axes extending horizontally and parallel to the support rods 24 and with the adjacent ends of the two filter elements abutting one another in a sealed relationship as shown in Fig. 3.
- the filter elements 28, and the support rods 24 therefor are arranged in two vertical columns with a vertical spacing 30 therebetween, and there is a small spacing between each pair of adjacent filter elements in each column to provide a space for air to flow therebetween and around the filter elements 28.
- a dirty air inlet conduit 32 is located above a chamber 34 and communicates with an inlet air plenum 36 that is defined by the side wall 20, two triangular shaped side walls 38, and a flat back wall 40 that extends diagonally across the chamber 34.
- the inlet plenum 36 communicates with the interior of the upper housing 12 through a rectangular inlet opening 42 formed in the side wall 20.
- the remainder of the chamber 34 on either side of the enclosed inlet plenum 36 constitutes an outlet plenum 44 in communication with all of the outlet openings 26, it being noted that the portions of the outlet plenum 44 on both sides of the inlet plenum 36 are in open communication with one another in the area behind the diagonally extending end wall 40 of the inlet plenum, whereby all of the outlet air in the outlet plenum 44 can be removed therefrom through the outlet conduit 46.
- the outlet plenum 44 also houses conventional pulse jet cleaning devices for periodically cleaning the filter elements 28, such pulse jet cleaning device including a compressed air header 48 mounted beneath the outlet plenum 44 which communicates through a pulse valve 50 with each of two vertical pipes 54 arranged in the outlet plenum 44 on each side of the inlet plenum 36 and directly behind the vertical row of outlet openings 26, only one of such vertical pipes 54 being shown in Fig. 3.
- each of the vertically extending pipes 52 are provided with nozzles 54 projecting away from the vertical pipe 52 toward the outlet openings 26.
- the pulse valve 50 for each vertical pipe 52 opens for a short period of time to permit a pulse of high pressure air to flow from the compressed air header 48, through the vertical pipes, and out through the nozzles 54 where the pulses are directed to the interior surfaces of the filter elements 28 to set up a shock wave and reverse air flow that removes foreign matter and dust collected at the exterior surface of the filter elements 28, whereupon such dust and particles eventually fall by gravity to the lower housing or hopper 14 for collection.
- the access wall 22 of the upper housing portion 12 is provided with a plurality of access openings 56 through which the filter elements 28 can be inserted into, or removed from, each of the clusters of support rods 24.
- a closure door 58 is provided at each access opening 56, and is carried by a hinge 60 which permits the closure door to be moved from an open position (see Fig. 3) for insertion and removal of the filter elements, and a closed position (see Fig. 1) for sealing the upper housing portion 12.
- the inside face of each closure door 58 is provided with an annular ring 62 projecting outwardly therefrom a short distance, and this annular ring 62 is utilized to support resilient material that will engage the end face of the filter elements 28 when the closure doors 58 are moved to their closed position.
- the resilient sealing material is mounted on the inside of the closure door as two separate pieces, namely a first piece 64 which is circular in shape and has a diameter such that it will be held in place within the projecting shoulder 62 by frictional contact therewith, and a second piece 66 which is annular in shape and which fits about the outside surface of the projecting shoulder 62 and held in place by frictional contact thereat.
- first piece 64 which is circular in shape and has a diameter such that it will be held in place within the projecting shoulder 62 by frictional contact therewith
- a second piece 66 which is annular in shape and which fits about the outside surface of the projecting shoulder 62 and held in place by frictional contact thereat.
- the annular ring 62 is specially sized to engage the face of the forward filter element 28 and pushes both filter elements 28 along the support rods 24 toward engagement with the side wall 20 to establish a proper sealing relationship between the side wall 20 and rearmost filter element 28, between the two elements 28, and between the forward filter element 28 and the annular ring 62.
- each closure door 58 is provided with a unique latching arrangement that permits each closure door 58 to be individually secured at its closed position without using any special tools.
- a slot-forming bracket 68 is fixed to the access wall 22 adjacent each access opening 56, and each bracket 68 includes a T-shaped slot 70.
- Each closure door 58 is provided with a cooperating slot 72 which, when the closure door is moved to its closed position, will overlap with a portion of the extending end of the T-shaped slot 70.
- a carriage bolt member 74 is provided, and it includes an enlarged head portion 76 which is larger than the width of the slots 70 and 72 and which is integrally formed with a square projection 78 having a threaded screw 80 extending therefrom to threadably engage a bolt portion 82 that is formed with extending arm portions 84 that can be easily grasped for manual turning.
- a conventional washer 86 may be provided for abutment with the bolt member 82.
- the closure door 58 is then moved to its closed position with the slots 70 and 72 overlapping as described above, and the square nut portion 78 of the latching assembly is then slidably moved in the overlapping slots until the latching member assumes the position shown in Fig. 4.
- the operator grasps the threaded bolt portion 82 and tightens it onto the threaded screw 80, whereby the closure door, and the first and second resilient seal elements 64, 66, are urged into positive and sealing relationship with the end of the filter element 28 as shown in Fig. 4.
- the threaded bolt member 82 is manually turned on the threaded screw member 80 until the latch member is in a loosened position, whereupon it can be slidably moved to the right as shown in Fig. 4 and out of contact with the closure door 58. Also, at this position of the latch member, it will be noted that the enlarged head 76 will maintain the latch member within the confines of the slot-forming bracket 68 so that it can be quickly and easily again moved to the left when the closure door 58 is again moved to its closed position for sealing.
- a pressure differential is established between the inlet conduit 32 and the outlet conduit 46 so that transport air having dust particles or other foreign matter flows at a relatively high velocity into and through the inlet plenum 36 which is formed, as described above, to direct this transport air in a predetermined flow path directed downwardly toward the hopper or lower housing portion 14 and alongside the exterior surfaces of the filter elements 28.
- This downwardly directed flow path heavier particles of foreign matter which are entrained in the transport air will be carried directly to the hopper 14 by inertia for collection thereat, and the lighter and smaller particles of foreign matter will be carried upwardly in the upper housing 12 by the normal flow of the transport air to and through the filter elements 28 (see Fig. 6).
- the pulse valves 50 are operated in a conventional fashion to cause brief pulses of high pressure air to be admitted from each of the nozzles 54 in a direction toward the interior of the filter elements 28.
- the dust particles may be re-entrained in the transport air so as to be drawn back to the surface of the filter element 28 from which they were separated, or they may move downwardly for re-entrainment and collection at the exterior surface of a filter element below the filter element from which they were originally discharged.
- the present invention also provides a structure that permits this replacement procedure to take place quickly and easily, and without requiring any special tools of any kind. More specifically, the carriage bolt member 74 can be easily turned manually by grasping the arms 84 of the threaded bolt member 82 to loosen the carriage bolt member 74, after which it can be easily moved in the slots 70, 72 until the closure door slot 72 is cleared, whereupon the closure door 58 can be opened and the carriage bolt member 74 retained in place within the confines of the bracket 68.
- the dirty filter elements 28 are then withdrawn through the access openings 56, and it will be noted that no tools or equipment of any kind are required to remove the filter elements 28 since they can simply be slidable moved along the two lowermost support rods 24 of the cluster supporting a particular filter element 28. Similarly, new filter elements can be inserted through the access openings 56 by sliding them along the two lowermost support rods 24 until they are nested as shown in Fig. 3, and it will be noted that the sole support for the filter elements 28 is the two lowermost support rods 24 and the filter elements 28 are otherwise cradled in each cluster of three support rods 24.
- closure doors 58 are then pressed into sealing engagement with the outermost ends of the filter elements 28, and the carriage bolt member 74 is again moved inwardly to the position shown in Fig. 4, after which the threaded bolt member 82 can be easily turned manually to secure each closure door in sealing relationship with the adjacent filter elements 28.
- the entire operation of replacing exhausted filters with new filters can be done in a matter of minutes, and no tool of any kind is required for any step in the operation. This is a significant improvement in terms of time and effort as compared with known dust collector and filter apparatus as described above.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
- This invention relates generally to apparatus for filtering large volumes of transport air having dust or other foreign matter entrained therein by passing such transport air through a plurality of self-cleaned filter elements, usually cylindrically shaped pleated paper filter elements.
- Historically, industrial filters have been designed to filter and clean large volumes of air by utilizing a plurality of large fabric bags through which the dirty air flows and deposits the entrained foreign matter on the surface of the bags. The effective life of these so-called "baghouse" filters is extended considerably by periodically cleaning the bags, such as by mechanical shaking, by pulses of air or the reverse flow of pressurized air, whereby most of the foreign matter deposited on the bags is removed therefrom and allowed to fall by gravity into a collection hopper or the like.
- In Frey U.S. Patent No. 4,218,227, an improved industrial dust collector is disclosed in which compact pleated paper filter elements are substituted for the conventional bag filters. As explained in greater detail in such patent, the compact size of the pleated paper filter elements, as compared to the much larger cylindrical bags, resulted in a significant reduction in the overall size of the filter apparatus as a whole, assuming the same quantity of transport air is cleaned by both units. In the Frey dust collector and most of its progeny, the pleated paper filters are generally cylindrical in shape and are mounted to a partition plate to hang vertically downwardly therefrom. Since the filter elements depend vertically downwardly, the bottom ends of the filter must be blanked off or capped to prevent the upwardly moving transport air from entering the filter without passing through the filter media, and therefor the vertically disposed filter elements themselves reduce the available space for proper interstitial velocity of the transport air, whereby a larger overall dust collector housing must be provided to assure such proper interstitial velocity. Moreover, this type of dust collector usually suffered the disadvantage of requiring a relatively complex mounting arrangement for mounting the filter elements within the housing at a vertical disposition, and when the filter elements eventually had to be replaced, the usual practice was to shut the dust collector down for a considerable period of time so that a workman could enter the filter apparatus and manually remove and replace each filter element from inside the housing of the filter apparatus.
- In an effort to overcome some of the aforesaid disadvantages of the conventional dust collector having pleated paper filter elements, it has been proposed to position such filter elements with a horizontal extent or at least generally horizontal extent, as compared with the vertical extent as disclosed in the Frey patent. Representative disclosures of such horizontal-type dust collectors may be found in Schuler U.S. Patent No. 4,395,269, Browning U.S. Patent No. 4,277,260, and Russian Patent 627841. The Schuler patent states that the dust collector disclosed therein, which includes generally horizontal positioning of the filter elements, results in a more compact dust collector that has a cleaning capacity of at least forty to fifty or more c.f.m. per cubic foot of volume, as compared with the typical vertically disposed filter elements. Advantages are also asserted to result from the downwardly slanted positioning of the filter elements, and the utilization of a baffle at the inlet of the dust collector which is struck by the particles of foreign matter entering the dust collector, to thereby prevent direct impingement of such foreign matter upon the uppermost filter elements and reduce wear on such filter elements. However, with this arrangement, a somewhat complicated mounting arrangement is provided for the filter elements, including a specially formed stepped mounting plate, a cantilevered yoke assembly for extending through the interior of each filter element to support it, and an end cap detachably mounted on the yoke by a bolt and handle. Moreover, the presence of the baffle at the inlet of the dust collector inherently interferes with the downward flow of the dust particles impinging thereagainst, whereby the relatively large particles tend to remain entrained in the transport air for cleaning by the filter elements rather than passing directly to the bottom of the dust collector for collection thereat without burdening the filter elements in a manner that can increase the pressure drop thereacross and/or require most frequent cleaning by the pulse jet cleaning apparatus.
- In contrast to the devices discussed above, the present invention provides a dust collector or filtering apparatus which obtains all of the space saving advantages obtained from using horizontally disposed filter elements while also alleviating the aforesaid drawbacks associated with known apparatus.
- In accordance with the present invention, apparatus for filtering dust and the like entrained in a flow of transport air or other gas is provided, such apparatus comprising a generally enclosed housing having a side wall, an upper filtering portion, and a lower collection portion. A plurality of conventional filter elements are disposed in the upper portion of the housing, each such filter element being generally hollow and mounted with its central axis extending substantially horizontally away from the side wall of the housing, the filter elements being arranged in at least one, and preferably two, generally vertical columns with a predetermined spacing between each filter element and between the two columns. An inlet arrangement for the dirty air is located at the side wall of the housing, and it is formed to direct the dirty air in a predetermined flow path that is directed downwardly toward the lower collection portion of the housing and alongside the exterior surfaces of the filter elements in the aforesaid vertical column or columns, whereby the heavier particles of foreign matter entrained in the transport air will be carried by inertia and the transport air directly to the lower portion of the housing for collection thereat, and the lighter particles of foreign matter will be separated from the carrier air by passing through the filter elements. An outlet is provided for communicating with the downstream side of the filter elements for permitting removal of the cleaned transport air, and, preferably, a conventional pulse jet cleaning apparatus is provided for periodically transmitting pulses of pressurized air to the interior of the filter elements for cleaning dust particles and the like from the exterior surface of such filter elements.
- In the preferred embodiment of the present invention, the filter elements are arranged in two vertical columns having a spacing therebetween, and the inlet for the dirty air includes an opening in the side wall of the housing that is positioned adjacent the spacing between the two columns of filter elements. Additionally, the inlet includes a specially formed plenum that receives transport air adjacent the top of the housing and directs the transport air in a downward direction toward and through the inlet opening, the inlet plenum having a gradually decreasing cross-sectional area along its downward extent.
- Additionally, in the preferred embodiment of the present invention, each filter element is individually supported in the upper housing by three support rods extending horizontally across the upper housing, with two of such support rods being spaced apart to permit the exterior surface of the cylindrical filter elements to rest thereon, whereby such support rods constitute the sole support for the filter element, and the third support rod extends above the surface of the filter element to prevent movement of the filter element in any direction. In accordance with a further feature of the present invention, the housing includes an access wall having a plurality of access openings therein, each access opening being aligned with a cluster of three support rods for each filter element, whereby the filter elements can be easily inserted in, or removed from, the upper housing by moving the filter element through the access openings and sliding them along the horizontally extending support rods. Each access opening is preferably provided with a hinged door that includes a resilient sealing material mounted on the inside face of the door so that when the door is at its closed position to cover the access opening, the sealing material will be urged against the end of the filter element for that access opening to thereby seal the end of the filter element and prevent the flow of dirty air around the end of the filter element. Also, each door is provided with a unique latch arrangement that includes cooperating slots located in the door and in the housing, and a carriage bolt member slidable in these slots between an inoperable position releasing the door to permit opening thereof, and an operable position at which the door is maintained at its closed position, the carriage bolt member including a manually turnable element for readily securing the door in its closed position without requiring any tools.
-
- Fig. 1 is a front elevational view of a filter apparatus according to the present invention;
- Fig. 2 is a side elevational view of the filter apparatus shown in Fig. 1;
- Fig. 3 is a diagrammatic perspective view, partially broken away, illustrating the upper portion of the housing of the filter apparatus illustrated in Fig. 1;
- Fig. 4 is a detailed view illustrating the latch arrangement for the access doors;
- Fig. 5 is a perspective view illustrating the carriage bolt member of the aforesaid latch arrangement; and
- Fig. 6 is a diagrammatic view illustrating the flow path of dust particles within the filter apparatus.
- Looking now in greater detail at the accompanying drawings, Figs. 1 and 2 illustrate a dust collector or filtering
apparatus 10 which includes anupper housing portion 12 in which filtering of transport air having entrained foreign particles therein is carried out in a manner to be described presently, and alower housing portion 14, generally referred to as a hopper, in which the particles separated from the transport air are collected and ultimately removed in any conventional manner through the bottom of thehopper 14. A plurality oflegs 16 are provided, andlifting lugs 18 may also be provided for lifting and moving thefilter apparatus 10 when desired. - As best seen in Figs. 2 and 3, the
upper housing portion 12 is rectangular in shape, and includes aside wall 20 opposed to and facing anaccess wall 22. A plurality ofsupport rods 24 extend horizontally across theupper housing portion 12 and they are supported at each end thereof in theaccess wall 22 and theside wall 20, respectively. As shown in Fig. 3, theside wall 20 has a plurality ofoutlet openings 26, the function of which will be explained presently, and it will be noted that thesupport rods 24 are arranged in clusters of three rods lying in a generally circular pattern and spaced from one another so that the bottom two rods in each cluster are parallel to one another whereby afilter element 28 can rest thereon, and the third rod in each cluster is located generally above thefilter element 28 so that it is essentially contained against movement in any direction by the cluster of threesupport rods 24. Thefilter elements 28 are conventional and may be of any well known constructions, and they are preferably formed as cylinders using a pleated paper filter media. In the disclosed embodiment of the present invention, two cylindrical pleated paper filter elements are supported in each cluster of three support rods, and they are arranged end-to-end with their axes extending horizontally and parallel to thesupport rods 24 and with the adjacent ends of the two filter elements abutting one another in a sealed relationship as shown in Fig. 3. Preferably, thefilter elements 28, and thesupport rods 24 therefor, are arranged in two vertical columns with avertical spacing 30 therebetween, and there is a small spacing between each pair of adjacent filter elements in each column to provide a space for air to flow therebetween and around thefilter elements 28. - A dirty
air inlet conduit 32 is located above achamber 34 and communicates with aninlet air plenum 36 that is defined by theside wall 20, two triangularshaped side walls 38, and aflat back wall 40 that extends diagonally across thechamber 34. Theinlet plenum 36 communicates with the interior of theupper housing 12 through arectangular inlet opening 42 formed in theside wall 20. The remainder of thechamber 34 on either side of the enclosedinlet plenum 36 constitutes anoutlet plenum 44 in communication with all of theoutlet openings 26, it being noted that the portions of theoutlet plenum 44 on both sides of theinlet plenum 36 are in open communication with one another in the area behind the diagonally extendingend wall 40 of the inlet plenum, whereby all of the outlet air in theoutlet plenum 44 can be removed therefrom through theoutlet conduit 46. Theoutlet plenum 44 also houses conventional pulse jet cleaning devices for periodically cleaning thefilter elements 28, such pulse jet cleaning device including acompressed air header 48 mounted beneath theoutlet plenum 44 which communicates through apulse valve 50 with each of twovertical pipes 54 arranged in theoutlet plenum 44 on each side of theinlet plenum 36 and directly behind the vertical row ofoutlet openings 26, only one of suchvertical pipes 54 being shown in Fig. 3. In a conventional and well known manner, each of the vertically extendingpipes 52 are provided withnozzles 54 projecting away from thevertical pipe 52 toward theoutlet openings 26. Whenever it is desired to clean thefilter elements 28, such as at timed intervals or when a predetermined pressure drop across the filter elements is sensed, thepulse valve 50 for eachvertical pipe 52 opens for a short period of time to permit a pulse of high pressure air to flow from thecompressed air header 48, through the vertical pipes, and out through thenozzles 54 where the pulses are directed to the interior surfaces of thefilter elements 28 to set up a shock wave and reverse air flow that removes foreign matter and dust collected at the exterior surface of thefilter elements 28, whereupon such dust and particles eventually fall by gravity to the lower housing or hopper 14 for collection. - The
access wall 22 of theupper housing portion 12 is provided with a plurality ofaccess openings 56 through which thefilter elements 28 can be inserted into, or removed from, each of the clusters ofsupport rods 24. Aclosure door 58 is provided at each access opening 56, and is carried by ahinge 60 which permits the closure door to be moved from an open position (see Fig. 3) for insertion and removal of the filter elements, and a closed position (see Fig. 1) for sealing theupper housing portion 12. The inside face of eachclosure door 58 is provided with anannular ring 62 projecting outwardly therefrom a short distance, and thisannular ring 62 is utilized to support resilient material that will engage the end face of thefilter elements 28 when theclosure doors 58 are moved to their closed position. More specifically, the resilient sealing material is mounted on the inside of the closure door as two separate pieces, namely afirst piece 64 which is circular in shape and has a diameter such that it will be held in place within the projectingshoulder 62 by frictional contact therewith, and asecond piece 66 which is annular in shape and which fits about the outside surface of the projectingshoulder 62 and held in place by frictional contact thereat. Thus, the two sections ofresilient sealing material closure door 58 is closed, theannular ring 62 is specially sized to engage the face of theforward filter element 28 and pushes bothfilter elements 28 along thesupport rods 24 toward engagement with theside wall 20 to establish a proper sealing relationship between theside wall 20 andrearmost filter element 28, between the twoelements 28, and between theforward filter element 28 and theannular ring 62. - In accordance with a further feature of the present invention, each
closure door 58 is provided with a unique latching arrangement that permits eachclosure door 58 to be individually secured at its closed position without using any special tools. As best seen in Figs. 3-5, a slot-formingbracket 68 is fixed to theaccess wall 22 adjacent each access opening 56, and eachbracket 68 includes a T-shaped slot 70. Eachclosure door 58 is provided with acooperating slot 72 which, when the closure door is moved to its closed position, will overlap with a portion of the extending end of the T-shaped slot 70. Acarriage bolt member 74 is provided, and it includes an enlargedhead portion 76 which is larger than the width of theslots square projection 78 having a threadedscrew 80 extending therefrom to threadably engage abolt portion 82 that is formed with extendingarm portions 84 that can be easily grasped for manual turning. Aconventional washer 86 may be provided for abutment with thebolt member 82. In operation, the enlargedhead portion 76 is inserted through the top part of the T-shaped slot 70, and the entire latch member is manipulated to locate the enlarged head portion underneath theslot 70 with thesquare bolt portion 78 slidably disposed in the extending end portion of the T-shaped slot 70. Theclosure door 58 is then moved to its closed position with theslots square nut portion 78 of the latching assembly is then slidably moved in the overlapping slots until the latching member assumes the position shown in Fig. 4. The operator then grasps the threadedbolt portion 82 and tightens it onto the threadedscrew 80, whereby the closure door, and the first and secondresilient seal elements filter element 28 as shown in Fig. 4. Similarly, when it is necessary to open theclosure door 58, the threadedbolt member 82 is manually turned on the threadedscrew member 80 until the latch member is in a loosened position, whereupon it can be slidably moved to the right as shown in Fig. 4 and out of contact with theclosure door 58. Also, at this position of the latch member, it will be noted that theenlarged head 76 will maintain the latch member within the confines of the slot-formingbracket 68 so that it can be quickly and easily again moved to the left when theclosure door 58 is again moved to its closed position for sealing. - In operation, and with all of the
filter elements 28 in place as shown in Fig. 3, a pressure differential is established between theinlet conduit 32 and theoutlet conduit 46 so that transport air having dust particles or other foreign matter flows at a relatively high velocity into and through theinlet plenum 36 which is formed, as described above, to direct this transport air in a predetermined flow path directed downwardly toward the hopper orlower housing portion 14 and alongside the exterior surfaces of thefilter elements 28. With this downwardly directed flow path, heavier particles of foreign matter which are entrained in the transport air will be carried directly to thehopper 14 by inertia for collection thereat, and the lighter and smaller particles of foreign matter will be carried upwardly in theupper housing 12 by the normal flow of the transport air to and through the filter elements 28 (see Fig. 6). These lighter particles will be deposited or collected at the exterior surface of the filter element as the transport air passes through the filter media of thefilter elements 28. The cleaned air flows from the interior portion of thefilter elements 28, through theoutlet openings 26, through theoutlet plenum 44, and is finally discharged through theoutlet conduit 46. At periodic timed intervals, or when the collected dust particles accumulate on the exterior surface of thefilter elements 28 to such an extent that the pressure drop across thefilter elements 28 reaches a predetermined maximum value, thepulse valves 50 are operated in a conventional fashion to cause brief pulses of high pressure air to be admitted from each of thenozzles 54 in a direction toward the interior of thefilter elements 28. These high energy pulses cause the collected dust particles to move away from the exterior surface of thefilter elements 28, and many, if not most, of these dust particles then fall by gravity to the bottom of the housing for collection at thehopper 14. In some cases, the dust particles may be re-entrained in the transport air so as to be drawn back to the surface of thefilter element 28 from which they were separated, or they may move downwardly for re-entrainment and collection at the exterior surface of a filter element below the filter element from which they were originally discharged. - Since many of the heavier particles entrained in the transport air are carried directly to the
hopper 14 as described above, these particles need not be filtered from the transport air using the available surface area of thefilter elements 28, thereby substantially increasing the operating efficiency of the dust collector of the present invention. Additionally, since there is less loading of dust particles on the surface of thefilter elements 28, they will have a longer operating life. - When the
filter elements 28 must eventually be replaced, the present invention also provides a structure that permits this replacement procedure to take place quickly and easily, and without requiring any special tools of any kind. More specifically, thecarriage bolt member 74 can be easily turned manually by grasping thearms 84 of the threadedbolt member 82 to loosen thecarriage bolt member 74, after which it can be easily moved in theslots closure door slot 72 is cleared, whereupon theclosure door 58 can be opened and thecarriage bolt member 74 retained in place within the confines of thebracket 68. Thedirty filter elements 28 are then withdrawn through theaccess openings 56, and it will be noted that no tools or equipment of any kind are required to remove thefilter elements 28 since they can simply be slidable moved along the twolowermost support rods 24 of the cluster supporting aparticular filter element 28. Similarly, new filter elements can be inserted through theaccess openings 56 by sliding them along the twolowermost support rods 24 until they are nested as shown in Fig. 3, and it will be noted that the sole support for thefilter elements 28 is the twolowermost support rods 24 and thefilter elements 28 are otherwise cradled in each cluster of threesupport rods 24. Theclosure doors 58 are then pressed into sealing engagement with the outermost ends of thefilter elements 28, and thecarriage bolt member 74 is again moved inwardly to the position shown in Fig. 4, after which the threadedbolt member 82 can be easily turned manually to secure each closure door in sealing relationship with theadjacent filter elements 28. Thus, the entire operation of replacing exhausted filters with new filters can be done in a matter of minutes, and no tool of any kind is required for any step in the operation. This is a significant improvement in terms of time and effort as compared with known dust collector and filter apparatus as described above. - It will therefore be readily understood by those persons skilled in the art that the present invention is susceptible of a broad utility and application. Many embodiments and adaptations of the present invention other than those herein described, as well as many variations, modifications and equivalent arrangements will be apparent from or reasonable suggested by the present invention and the foregoing description thereof, without departing from the substance or scope of the present invention. Accordingly, while the present invention has been described herein in detail in relation to its preferred embodiment, it is to be understood that this disclosure is only illustrative and exemplary of the present invention and is made merely for purposes of providing a full and enabling disclosure of the invention. The foregoing disclosure is not intended or to be construed to limit the present invention or otherwise to exclude any such other embodiment, adaptations, variations, modifications and equivalent arrangements, the present invention being limited only by the claims appended hereto and the equivalents thereof.
Claims (23)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/351,095 US5062872A (en) | 1989-05-12 | 1989-05-12 | Air filter with horizontal filter elements |
US351095 | 1989-05-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0398091A1 true EP0398091A1 (en) | 1990-11-22 |
EP0398091B1 EP0398091B1 (en) | 1996-01-10 |
Family
ID=23379549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90108476A Expired - Lifetime EP0398091B1 (en) | 1989-05-12 | 1990-05-05 | Air filter with horizontal filter elements |
Country Status (6)
Country | Link |
---|---|
US (1) | US5062872A (en) |
EP (1) | EP0398091B1 (en) |
AT (1) | ATE132769T1 (en) |
CA (1) | CA2016596C (en) |
DE (1) | DE69024699T2 (en) |
ES (1) | ES2081871T3 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0558917A1 (en) * | 1992-03-06 | 1993-09-08 | SCHLICK-Roto-Jet Maschinenbau GmbH | Filter apparatus comprising a casing with filter elements |
DE4405597C1 (en) * | 1994-02-22 | 1996-01-04 | Sult Gmbh Staub Und Lufttechni | Filter device to remove particles from a gas stream like air |
WO2002016007A2 (en) * | 2000-08-24 | 2002-02-28 | Donaldson Company, Inc. | A filter construction apparatus and method |
EP1938884A1 (en) | 2006-12-21 | 2008-07-02 | Infastaub GmbH | Filter device for removing particulate matter from a gas flow loaded with particulate matter and filter system |
US8048186B2 (en) | 2009-04-02 | 2011-11-01 | General Electric Company | Filter retention systems and devices |
US8105409B2 (en) | 2009-01-30 | 2012-01-31 | General Electric Company | Filter retention system |
EP3069774A1 (en) | 2015-03-16 | 2016-09-21 | AAF France | Dust-collector with filtering cartridges |
US10119469B2 (en) | 2016-09-15 | 2018-11-06 | General Electric Company | Method and apparatus for modularized inlet silencer baffles |
WO2018204900A1 (en) * | 2017-05-05 | 2018-11-08 | Robovent Products Group, Inc. | Horizontal elongated industrial air filter |
CN109647087A (en) * | 2019-02-21 | 2019-04-19 | 昆山赛琦节能机电设备有限公司 | A kind of filter cartridge dust remover equipped with maintenance door |
US10385778B2 (en) | 2017-01-06 | 2019-08-20 | General Electric Company | System and method for an improved inlet silencer baffle |
US10550766B2 (en) | 2017-01-06 | 2020-02-04 | General Electric Company | System and method for an improved inlet silencer baffle |
US10722990B2 (en) | 2016-09-15 | 2020-07-28 | General Electric Company | Method for installing and removing modularized silencer baffles |
WO2020220995A1 (en) * | 2019-04-29 | 2020-11-05 | 北京市环境保护科学研究院 | Composite filter element and volatile organic compound purification device |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU681786B2 (en) * | 1994-04-11 | 1997-09-04 | Donaldson Company Inc. | Air filter assembly for filtering air with particulate matter |
JP3066247B2 (en) * | 1994-05-31 | 2000-07-17 | 日本碍子株式会社 | Dust collector |
US5803954A (en) * | 1997-04-11 | 1998-09-08 | Aaf International | Particulate filter collector arrangement and method |
US6511637B2 (en) * | 1998-04-17 | 2003-01-28 | Bundy Environmental Technology, Inc. | Air pollution control assembly and method |
US6090173A (en) * | 1998-08-07 | 2000-07-18 | Donaldson Company, Inc. | Air filter assembly for filtering air with particulate matter |
US6214077B1 (en) * | 1999-05-10 | 2001-04-10 | Venturedyne, Ltd. | Spring loaded door assembly |
US6368390B1 (en) * | 2000-06-19 | 2002-04-09 | Venturedyne, Ltd. | Automatic filter rotating device |
US20040103626A1 (en) * | 2002-08-23 | 2004-06-03 | Warth Scott B. | Filter element, filter assembly, gas turbine system, and methods |
DE10331741A1 (en) * | 2003-07-11 | 2005-01-27 | Jens Emmerling | storage system |
US6974491B1 (en) * | 2003-08-01 | 2005-12-13 | Kendall Stephen P | Cartridge locking device and method |
WO2007106001A1 (en) * | 2006-03-14 | 2007-09-20 | Camfil Ab | Air filter housing with sealing means |
US7404839B2 (en) * | 2006-03-17 | 2008-07-29 | Tdc Filter Manufacturing, Inc. | Filter assembly and adaptor |
EP2058044B1 (en) * | 2006-11-06 | 2011-01-05 | Mitsubishi Heavy Industries, Ltd. | Dust collector |
CN101541395B (en) | 2006-11-30 | 2013-04-10 | 唐纳森公司 | System configuration of pulsed cleaned panel-style filter elements and methods |
US8075674B2 (en) | 2006-11-30 | 2011-12-13 | Donaldson Company, Inc. | Filter apparatus with pulse cleaning and methods for pulse cleaning filters |
EP2091629A2 (en) | 2006-11-30 | 2009-08-26 | Donaldson Company, Inc. | Nozzle arrangements and method for cleaning filter elements |
WO2008067457A1 (en) | 2006-11-30 | 2008-06-05 | Donaldson Company, Inc. | Filter apparatus configuration of pulsed cleaned panel-style filters and methods |
WO2009102381A1 (en) * | 2008-02-14 | 2009-08-20 | Donaldson Company, Inc. | Method for selecting a filter element for a dust collector with regeneration with pulsed gas |
CN101371960A (en) * | 2008-05-27 | 2009-02-25 | 综合能源有限公司 | New use of cloth bag dust collection method and device thereof |
WO2011005438A2 (en) | 2009-06-22 | 2011-01-13 | Donaldson Company, Inc. | Filter element support assembly, quick installation system, and methods |
US8118900B2 (en) | 2009-09-30 | 2012-02-21 | Donaldson Company, Inc. | Dust collector and methods |
US8673037B2 (en) * | 2011-10-18 | 2014-03-18 | Camfil Farr, Inc. | Air filter with balanced seal |
CA2862359C (en) | 2012-01-05 | 2016-12-20 | Tdc Filter Manufacturing, Inc. | Waterproof and salt repellant media and filter |
USD698017S1 (en) | 2012-07-25 | 2014-01-21 | Tdc Filter Manufacturing, Inc. | Filter adaptor |
CN103816733A (en) * | 2014-03-31 | 2014-05-28 | 苏州木仁子金属材料科技有限公司 | Large quick dust collection device |
WO2015153906A2 (en) | 2014-04-04 | 2015-10-08 | Donaldson Company, Inc. | Filter elements with end cap features; element support assembly; and methods |
JP6776236B2 (en) * | 2014-11-28 | 2020-10-28 | ソウル バイオシス カンパニー リミテッドSeoul Viosys Co.,Ltd. | Air cleaner |
CN109316850A (en) * | 2018-10-26 | 2019-02-12 | 浙江鸿盛环保科技集团有限公司 | Modularization duster system and its control method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2088744A (en) * | 1980-10-11 | 1982-06-16 | Aldridge Air Control Ltd | Air filtering apparatus |
US4390354A (en) * | 1980-03-12 | 1983-06-28 | Witchell Stanley P | Air filters |
US4395269A (en) * | 1981-09-30 | 1983-07-26 | Donaldson Company, Inc. | Compact dust filter assembly |
US4760968A (en) * | 1987-06-30 | 1988-08-02 | Dravo Corporation | Integrated dust containment system for rotary crusher/breakers and the like |
US4820320A (en) * | 1988-02-16 | 1989-04-11 | Cox Donald G | Compact dust collector |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US582967A (en) * | 1897-05-18 | Dust-collector | ||
US2732099A (en) * | 1956-01-24 | davis | ||
US333020A (en) * | 1885-12-22 | morgan | ||
US1601148A (en) * | 1922-11-02 | 1926-09-28 | Ruemelin Richard | Dust separator |
US1743934A (en) * | 1924-11-26 | 1930-01-14 | Ruemelin Richard | Dust separator |
US1816064A (en) * | 1929-06-12 | 1931-07-28 | Waldenburg-Straus-S Eduard Von | Filtering apparatus |
US2255519A (en) * | 1940-02-09 | 1941-09-09 | Cullie C Preston | Separating apparatus |
US2867289A (en) * | 1956-08-16 | 1959-01-06 | W W Sly Mfg Company | Dust collector |
NL295777A (en) * | 1962-07-27 | 1900-01-01 | ||
US3385033A (en) * | 1965-11-22 | 1968-05-28 | W C Wiedenmann & Son Inc | Dust filter |
US3885932A (en) * | 1974-01-10 | 1975-05-27 | Super Products Corp | Dust filtration system |
US4218227A (en) * | 1975-07-28 | 1980-08-19 | Donaldson Company, Inc. | Dust collector |
SU627841A1 (en) * | 1976-01-16 | 1978-10-15 | Предприятие П/Я А-7229 | Bag-type filter |
ZA786014B (en) * | 1977-11-04 | 1979-10-31 | Nat Res Dev | Improvements in or relating to filtration apparatus |
US4171963A (en) * | 1978-02-01 | 1979-10-23 | Donaldson Company, Inc. | Filter element support member |
US4174204A (en) * | 1978-08-04 | 1979-11-13 | Donaldson Company, Inc. | Pulse jet cleaned air filter assembly with integral air compressor |
US4409009A (en) * | 1978-11-20 | 1983-10-11 | Nordson Corporation | Powder spray booth |
FR2450628A1 (en) * | 1979-03-05 | 1980-10-03 | Air Ind | IMPROVEMENTS RELATING TO DECOLMATION PROCESSES FOR A FILTRATION INSTALLATION, AND TO FILTRATION INSTALLATIONS IMPLEMENTING SUCH METHODS |
US4277260A (en) * | 1979-08-14 | 1981-07-07 | Browning Jesse H | Powder collectors |
US4560396A (en) * | 1984-08-20 | 1985-12-24 | Allis-Chalmers Corporation | Down flow filter panel dust collector |
-
1989
- 1989-05-12 US US07/351,095 patent/US5062872A/en not_active Expired - Lifetime
-
1990
- 1990-05-05 DE DE69024699T patent/DE69024699T2/en not_active Expired - Fee Related
- 1990-05-05 AT AT90108476T patent/ATE132769T1/en not_active IP Right Cessation
- 1990-05-05 EP EP90108476A patent/EP0398091B1/en not_active Expired - Lifetime
- 1990-05-05 ES ES90108476T patent/ES2081871T3/en not_active Expired - Lifetime
- 1990-05-11 CA CA002016596A patent/CA2016596C/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4390354A (en) * | 1980-03-12 | 1983-06-28 | Witchell Stanley P | Air filters |
GB2088744A (en) * | 1980-10-11 | 1982-06-16 | Aldridge Air Control Ltd | Air filtering apparatus |
US4395269A (en) * | 1981-09-30 | 1983-07-26 | Donaldson Company, Inc. | Compact dust filter assembly |
US4395269B1 (en) * | 1981-09-30 | 1994-08-30 | Donaldson Co Inc | Compact dust filter assembly |
US4760968A (en) * | 1987-06-30 | 1988-08-02 | Dravo Corporation | Integrated dust containment system for rotary crusher/breakers and the like |
US4820320A (en) * | 1988-02-16 | 1989-04-11 | Cox Donald G | Compact dust collector |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0558917A1 (en) * | 1992-03-06 | 1993-09-08 | SCHLICK-Roto-Jet Maschinenbau GmbH | Filter apparatus comprising a casing with filter elements |
DE4207023A1 (en) * | 1992-03-06 | 1993-09-16 | Schlick Roto Jet Masch | FILTER DEVICE WITH HOUSING AND FILTER ELEMENTS IN THE HOUSING |
DE4405597C1 (en) * | 1994-02-22 | 1996-01-04 | Sult Gmbh Staub Und Lufttechni | Filter device to remove particles from a gas stream like air |
WO2002016007A2 (en) * | 2000-08-24 | 2002-02-28 | Donaldson Company, Inc. | A filter construction apparatus and method |
WO2002016007A3 (en) * | 2000-08-24 | 2002-07-11 | Donaldson Co Inc | A filter construction apparatus and method |
AU2001283200B2 (en) * | 2000-08-24 | 2006-08-31 | Donaldson Company, Inc. | A filter construction apparatus and method |
EP1938884A1 (en) | 2006-12-21 | 2008-07-02 | Infastaub GmbH | Filter device for removing particulate matter from a gas flow loaded with particulate matter and filter system |
US8105409B2 (en) | 2009-01-30 | 2012-01-31 | General Electric Company | Filter retention system |
US8048186B2 (en) | 2009-04-02 | 2011-11-01 | General Electric Company | Filter retention systems and devices |
EP3069774A1 (en) | 2015-03-16 | 2016-09-21 | AAF France | Dust-collector with filtering cartridges |
FR3033713A1 (en) * | 2015-03-16 | 2016-09-23 | Aaf France | DUST COLLECTOR WITH FILTERING CARTRIDGE (S) |
US10119469B2 (en) | 2016-09-15 | 2018-11-06 | General Electric Company | Method and apparatus for modularized inlet silencer baffles |
US10722990B2 (en) | 2016-09-15 | 2020-07-28 | General Electric Company | Method for installing and removing modularized silencer baffles |
US10385778B2 (en) | 2017-01-06 | 2019-08-20 | General Electric Company | System and method for an improved inlet silencer baffle |
US10550766B2 (en) | 2017-01-06 | 2020-02-04 | General Electric Company | System and method for an improved inlet silencer baffle |
WO2018204900A1 (en) * | 2017-05-05 | 2018-11-08 | Robovent Products Group, Inc. | Horizontal elongated industrial air filter |
CN109647087A (en) * | 2019-02-21 | 2019-04-19 | 昆山赛琦节能机电设备有限公司 | A kind of filter cartridge dust remover equipped with maintenance door |
WO2020220995A1 (en) * | 2019-04-29 | 2020-11-05 | 北京市环境保护科学研究院 | Composite filter element and volatile organic compound purification device |
Also Published As
Publication number | Publication date |
---|---|
ES2081871T3 (en) | 1996-03-16 |
CA2016596C (en) | 1997-10-21 |
DE69024699T2 (en) | 1996-05-23 |
CA2016596A1 (en) | 1990-11-12 |
US5062872A (en) | 1991-11-05 |
DE69024699D1 (en) | 1996-02-22 |
ATE132769T1 (en) | 1996-01-15 |
EP0398091B1 (en) | 1996-01-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5062872A (en) | Air filter with horizontal filter elements | |
US4395269A (en) | Compact dust filter assembly | |
US4445915A (en) | Dust collector filter cartridge and attachment means for suspending same from baghouse tube sheet | |
CA1290707C (en) | Air filtering apparatus | |
US5223005A (en) | Dust and fume collector | |
US11123671B2 (en) | Filter systems with dirty air chamber spacer elements and methods of using the same | |
US4560396A (en) | Down flow filter panel dust collector | |
US3739557A (en) | Bag filter arrangement | |
CA2066970C (en) | Dust collector with re-entrainment prevention walls | |
US5803954A (en) | Particulate filter collector arrangement and method | |
CA1069835A (en) | Dust collector | |
US4536200A (en) | Gas filter apparatus and method of filtering | |
US6280491B1 (en) | Cartridge filter | |
US3861893A (en) | Filter device with scavenger system | |
US3793811A (en) | Filters for separating dust from air | |
US5571299A (en) | Dust collector | |
CN112604441A (en) | Zinc dust explosion-proof dust removal system device | |
CN208959515U (en) | A kind of polishing class dust pulse dust collector | |
GB2222964A (en) | Air Filter | |
CN210057713U (en) | Cloth bag type pulse dust collector convenient to overhaul | |
US4584004A (en) | Dust collector | |
CN218188726U (en) | Flue gas desulfurization dust remover | |
CN215276229U (en) | Bag-type dust collector convenient for replacing filter bag | |
CN220071047U (en) | Cloth bag dust remover | |
SU1666161A1 (en) | Filtering and ventilation apparatus for welding process |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
17P | Request for examination filed |
Effective date: 19910515 |
|
17Q | First examination report despatched |
Effective date: 19920831 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
ITF | It: translation for a ep patent filed | ||
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19960110 Ref country code: LI Effective date: 19960110 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19960110 Ref country code: DK Effective date: 19960110 Ref country code: CH Effective date: 19960110 Ref country code: BE Effective date: 19960110 Ref country code: AT Effective date: 19960110 |
|
REF | Corresponds to: |
Ref document number: 132769 Country of ref document: AT Date of ref document: 19960115 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 69024699 Country of ref document: DE Date of ref document: 19960222 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2081871 Country of ref document: ES Kind code of ref document: T3 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19960410 |
|
ET | Fr: translation filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19960531 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20030429 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20030520 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20030522 Year of fee payment: 14 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20030617 Year of fee payment: 14 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040505 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040506 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20041201 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20040505 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050131 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050505 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20040506 |